Welcome to the store! 1. Real-time Viewing via Mobile Phone: When you go shopping or go to work on a business trip, you may not remember which doors and windows are open and closed. At this time, you can click on your mobile phone to check the opening and closing status to reassure yourself. 2. Home Security: Children often like to keep themselves busy in the kitchen, living room, and bedroom, or sneak out to play, or go to the bathroom to play with water. With this door and window sensor, the voice will tell you if the child has sneaked out. 3. Mobile App Remote Push Alarm: Your mobile phone will be pushed to you in time with information about the opening and closing of doors and windows at home when you go out to work. 4. Easy to Use: Touch the door and window sensor, and the mobile phone sets the scene linkage, so that the lights, displays, cleaners, and stereos at home can "work" according to your wishes. 5. Sensor Anti-Disassembly Alarm: When the door and window sensor is removed and broken, the mobile phone client will receive a prompt. Item Type: Smart Door Window Sensor Material: ABS Color: As pictures shown Weight: Approx. 32g / 1.1oz Battery: 1 x CR2032 Button Battery 150mAh (included) Operating Current: ≤ 60mA Operating Temperature: -10℃ - 55℃ Operating Humidity: 10% - 90%RH Wireless: for Zigbee Package List: 2 x Door Magnet 1 x Double-sided Tape 1 x Manual 1 x Ejector Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!